My friend, you have thoroughly explained the exact problem I've been fighting for about three months now. I contacted their "support" when it first occurred. After having me try the most basic of things their official answer was "I don't know." After update 1.24 it got to where I could at least log in and play now, but the latency is ridiculous. Like if I try to open a barrel I will desync and have to stand there for up to two minutes before the game catches up and the barrel opens. Then I can play for about three to five minutes before I desync again. I can't even join official because there's no way to fight that way, and on my PVE private server I cant leave my base because desync every couple minutes is a guaranteed death sentence if I desync without realizing it and don't actually know I'm being attacked by infected...